Protected or armor-clad electric-switch fuse.



H. @BERRY E W. J. MARKHM? PROTECTED OR ARMOR CLAD ELECTRIC SWITCH PSE.

APPLICATION IILED JUNE 9, 1910. k

Fatenzel; Sepia. 13, i910.

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y HERBERT- HENRY BERRY AND WILLIAM J. MARKHAM, OF LONDON, ENGLAND.

PROTECTED OR ARMOR-CLAD ELECTRIC-SWITCH FUSE.

To all 'whom tt 'may concern:

Be itl known that we, HERBERT HENRY BERRY and VViLLrAM JAMES MARKHAM,both citizens of the -United Kingdom `of Great Britain and Ireland, andresidents of 78 Upper Thames street, London, E. C., Eng land, haveinvented certain'new and useful Improvements in Protectedor Armor-CladElectric-'Switch Fuses, of which the following is a specication, such aswill en able others skilled in the art to which it appertains to makeand use-the same.

This invention relates to electric switches andy electric switch fusesof that type which are inclosed in a metal case having a lhinged coverwhich carries the switch blades, the said blades being fixed to .a rodadapted Ato move to and fro throughqor below the saidI cover and beingmounted thereon, the said switch blades andthe rod with theirconnectingpa'rts being spring cont-rolled for the purpose of producingthe necessary quick make and quick break movements. Forms of this'switch have beendevised in whichv it is impossible to close the ,coverwith the switch blades in the on 7 position and also impossibleto openthe cover when the blades are in that position it being necessary towithdraw the `blades to the cti position to both close and open-thecover and our invention is applicable to -this form of switch. Hithertothe requisite movements of the switch blades from the on to the offpositions and vice versa have been accomplished by attaching to theouter end of the rod a knob or equivalent by which it can be pulled outand thrust back and although this arrangement answers-its purr pose wellwhen there is plenty of room in the place where the switches are 'fixed.itis unsuitable in those places where lthe space is limited and accessto the knob not easily possible.

To make the class of switch first herein referred to more convenientinuse and particularly to overcome the `objection mentioned in the lastparagraph we have devised a means whereby the movements of the rodcarrying the switch blades can be effected without inconvenience and theswitch can be fixed in more limited space than where the knob or othersuch handle is provided.

Our invention consists in providingahand lever at either side of thecase containing the switch to which hand lever a lever insideSpecioation of Letters Patent. Patented Sept. 13; 1910. Applicationvled.Tune 9, 1910. Serial No. 566,067.

the case is connected, the said lever being adapted to push on and pulloff the switch blades according to the direction in which the hand leveris moved.

V'Ve will now describe our invention with reference to the accompanyingdnawings in Figure l. is a sectional view of "a combined double poleswitch and fuses with its hinged cover open. Fig. 2. is a sectional Viewshowing thevhinged cover closed with the switch and fuses in its currentoli" position. Fig. 3. is a sectional View showingv the 4hinged coverclosed and the switch and fuses in its on position. Fig. 4. is aTsectional view showing that it is impossible for a careless operator toclose the same if the switch and fuses are in the on positin. It alsoshows -that the position of the switch contacts must bein the offposition, and the cover closed as inV Fig. 2 before the switch can beplaced in on position asin Fig. 3. Figs. l, 2, 3 and 4 show an outercase A with a lid or cover B arranged to open upon a hinge' C. Attachedto the cover a rapid make and rapid break switching device is arrangedto travel backward land forward in a parallel direction between twofixed points.

In the present example a band spring D rigidlyfixed to the cover B at E,E', has two loose members or metal plates 2, 2, sprung into slots in thespring D at H, H, and into V-ishaped grooves in a plunger head 8 whichis attached to a coupling or couplings or plunger or plungers carryingthe switch blades and the inter-locking projecting tube N. vFormerly theplunger or plungers to which the switch mechanism is coupled has beenguided through an aperture or apertures in the cover` of the case but 1nour improved apparatus we arrange the switch coupling or mechanism toslide backward and forward between two fixed points onone, two or moreVguide rods M which we attach to the inside cover of the case. In orderto obtain the make and break action of the switching device'we arrangeone or more operating levers F fixed to a spindle G the said spindletaking its bearings on opposite sides .of the case A, one end of thespindle G is arranged to project through a gland I in the side of thecase and has a fixed or detachable lever or key I for the purpose ofmoving the levers F and-of `op` erating the switch. The lever F l s abifurcation F in its free end, engaging a pin 3a in the plungei head 3.

The operation is as follows: To raise the cover B, the lever P is movedto the right, thereby forcing` the end of the lever F upwardly, and byengagement of said lever with the pin 8, the member 3 and contacts Q arebrought into the position shown in Fig. Q. A Jfurther movement of leversP will raise the cover (through contact with said cover) with the freeend of lever F,

the switch is in the on position would result in contacting the member Nwith' the abutment R and necessitate a reversal of the s witch to theoft position, before the closing ot' the cover would be effected.

Similarly, from an inspection of Figs. 3l

and 4t, it is obvious that the cover could not be opened while theswitch is closed; because of contact of the member N with the abutmentR.

lhat we claim and desire to secure by` Letters Patent is l. In anelectric switch, a case, a cover on theY case, a spring secured to saidcover, Vslots in the ends'of said spring, plates engaging the slots, aplunger head, said plun-A ger head having grooves, said plates' en.gaging said grooves, said plunger head having a pin, a bifurcated leverengaging said pin for actuating said plunger head'against the action ofsaid spring, means Jor actuatingthe lever, electric contacts secured tosaid case, and electric contacts 'carriedby said plunger head adapted toengage the first said electric contacts.

2. In an electric switch, a case, a cover on the case, a spring securedto said cover,

vslots in the ends of said spring, plates en gaging the slots, a plungerhead, said plunger head having grooves, plates engaging said grooves, abifurcated lever engaging said plunger head to actuate the same, aA

rod carried by said cover, a tube. carried by said plunger head, saidtube being slid# emee'e able `u'pon said rod for guiding said plungerhead, stationary electric contacts in said case, and electric contactscarriedby saifd plunger head adapted to engage said sta tionary electriccontacts.

3. ln an electric switch, a case, a cover on thel case, a rod centrallysecured to the cover, a plunger mechanism slidable upon the rod',electric contacts stationary within the case, electric contacts carriedby the plunger4 mechanism adapted to engage the first said velectriccontacts, spring pressed members connecting with the plunger mechanismfor accelerating the motion of said plunger mechanism, and' means formoving said plunger mechanism against the spring pressure.

. In an electric switclna case, a cover on the case, a rod centrallysecured to the cover,

a plunger mechanism slidable upon the rod, electric contacts stationarywithin the case,

electric contacts carried by the plunger mechanism adapted to engage therst said electric contacts, spring pressed members connected with theplunger mechanism ton.

accelerating the motion of said plungery mechanism, a lever in saidcase, a spindlecarrying said lever, a second lever external to the caseand mounted on said spindle for actuating the plunger mechanism.

5. In an electric switch, a case, a cover on the .,case,`a 'rodcentrally secured tothe cover, alplunger mechanism slidable upon therod, electric contacts stationary within the case, electric contactscarried by the plunger fmechanism vadapted to engagethe first saidelectric contacts, spring pressed members connected with the plungermechanism for accelerating the; motion of said plunger mechanism, abifurcated lever engaging a ypin in said plunger mechanism for actuatingsaid plunger mechanism, and means for actuating the lever.

In witness whereof we have hereunto set our hands in presence of twowitnesses.

HERBERT HENRY BERRY. Wzl MARKHAI.

Witnesses as to Herbert Henry Berry:

H. D. JAMESON, G. P; PHiLLrrrs. lTVitnesses to W J. Markhams signature:

ARTHUR SHELTON, CHARLES HENRY ALLwoon.

